Images
Formula: Fe3+O(OH)
Oxide, paramorph of
goethite and lepidocrocite,
both orthorhombic
Crystal System: Hexagonal
Specific gravity: 4.20 calculated
Streak: Yellow
Colour: Yellow-brown, brown
Magnetism: Magnetic
Environments
Feroxyhyte occurs in sea-floor (high pressure, low temperature, saltwater)
iron-manganese concretions, as cement
and coatings on clasts in chemically reduced, poorly drained soils and sediments; it is formed by the rapid oxidation
of ferrous compounds. Associated minerals are lepidocrocite and
goethite
(HOM, webmin)
Localities
At the Vrysaki Point slag locality, Velatouri, Lavreotiki, East Attica, Attica, Greece, feroxyhyte has
been found with phosgenite and
nealite
(Mindat photo).
Feroxhyte from the Vrysaki Point slag locality -
Image
At the type locality, Kolomyia, Ivano-Frankivsk Oblast, Ukraine, feroxyhyte is associated with
lepidocrocite and goethite
(Mindat).
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